Check for axminster-loom-needle motion



July 30, 1929. E. E. CLARKl CHECK FOR AXMINSTER LOOM NEEDLE MOTION Filed NOV. 30, 1925 2 Sheets-Sheet 1 July 30, 1929. E. E. CLARK CHECK FOR AXMINSTER LOOM NEEDLE MOTTON- 2 Sheets-Sheet 2 Filed Nov. 30, 1925 1 ,Iii ii, :Ir

Patented July 39, i929.

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EVER/ETT E. CLARK, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMITON & KNOWLES LOOM WORKS, OF WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

CHECK FOR AXMINSTER-LOOM-NEEDLE MOTION.

Application led November 30, 1925. ySerial No. 72,125.

'Ihis invention relates to improvements in needle motions for wide Axminster looms and 1t 1s the general object of the invention to -improve such motions so as to permit a higher production than has been possible heretofore.

In Axminster looms the needle motion and the selvage forming shuttle are located at opposite sides of the loom, and the needle is formed with an open eye through which the nose of the selvage shuttle passes when the needle is in the shed. Where the loom is wide and the needle is running at a relatively high rate of speed there is a tendency to rebound with the result that the eye in the needle does not register with the selvage shuttle. This causes a defective selvage and it is a further object of my invention to prevent this objectionable rebounding of the needle by applying a gradual check operative to bring the needle to rest in proper position.

It is a further obj ect of my invention to provide a continuous check having a plurality of abutments to cooperate with a part moving with the needle.

With these and other objects in view which showing my invention applied thereto with the needle at the inner end of its stroke,

Fig. 2 is an enlarged rear elevationof a portion of Fig. 1 showing the needle on its return stroke,

Fig. 3 is a vertical section onl line 3-3 of Fig. 2,

Fig. 4 is an enlarged rear elevation of the pivoted dog and carrier for the needle looking in the direction of arrow 4, Fig. 3,

Fig. 5 is an end elevation looking inthe direction of arrow 5, Fig. 4, and

Fig. 6 is an enlarged vertical section on line 6-6 of Fig. 2.

Referring to the drawings it will be seen that I have provided an end frame 10 extending laterally from the loom and on which is mounted a needle rail 11 provided with a groove 12 of dovetail form to receive a shoe 13 rigid with a needle carrier 14. The latter has secured thereto a cap 15 between which and the carrier 14 is clamped a flexible cord or cable 16. Secured to and movable with the vcarrier is a longitudinally movable member loted as at 24 and receiving reciprocating motion from a pitman arm 25 connected tothe segment as at 26. The arm 25 is moved back and forth by a crank mechanism not shown and moves the segment 23 to the right when the needle is moving inwardly and moving the segment to the left when the needle is withdrawn. The matter thus far described is of common construction and forms no part of my present invention.

In carrying out my improvements I bolt a stand 30 to the needle rail and provide a shaft 31 freely movable thereon, one end of said shaft havingkeyed thereto a friction head 32. Said friction head cooperates with Ia friction band 33 one end of which is an- ,chored at 34 to a fixed stud and the other end rof which is attached to the needle rail by an adjustable connection 35. The other end of shaft 31 has keyed thereto a sprocket 36 motion of which is resisted by the friction band and head. A second stand 37 is secured to the vlneedle rail and has pivotallymounted thereon a second sprocket 38y substantially the same las sprocket 36.

A chain 39 is passed around the sprockets and is provided with a plurality of abutments formed as special links, three of which are indicated on the drawings at 40, 40a, and 40h. Each of said links is provided with oblique faces 41 which are disposed at equal angles with respect to the central axis of the link perpendicular tothe chain.

The needle carrier 14 has extending rearwardly therefrom a stud 42 on which is mounted vfor free pivotal motion a dog 43 which asshown in Figs. 4 and 5 terminates in a wedge shaped vend 44 proportioned toengage the chain abutments or special links,

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Said dog is further provided with a face l5 positioned for engagement with a ledge 46 eX- tending rearwardly from the needle carrier 14 to limit counterclockwise movement of said dog. j v

In operation the needle carrier 14 will start from the left hand end of the needle rail as shown in Fig. 1 and will move toward the right until the upwardly extending end of the dog 43 engages special link 40 after which continued motion of the needle will be resisted by the friction existing between the head 32 and the friction band 33. At the end of its inner stroke, therefore, the needle will be pulled positively by the cable against the restraint imposed by the friction element with the result that the needle comes `to rest gradually due to the crank motion of the arm 25 and has little if any tendency to rebound.

As link 40 moves to the position shown in Figs; 1 and 2 link 102L will move to the position previously occupied by link 40 to be in position to engage the dog on its next inward stroke. By means of the adjustment 35 the degree of checking may be varied so as to bring the needle to rest without subjecting the cable to undue stretching. As the needle is withdrawn the upper part of the dog will be engaged by link 40a and moved to the full line position shown in Fig. 2 to permit the c arrier to pass from the friction element without causing movement of the latter. Because of the fact that the heavier part of the dog is to the left of the stud 42 said dog will be held inr the position shown in Fig. l by gravity.

Although I have shown my checking device as applied to an AXminster loom, yet it is equally applicable to the wire motion of a Vilton loom, and the longitudinally movable member mentioned in the claims may be either the needle of an Axminster loom or the wire of a Tilton loom.

From the foregoing it will be seen that I have provided means for checking the needle at theend of its stroke and that the checking may be varied by means of the adjustment of the friction band.

Having thus described my invention it will be apparent that changes and modifications may be made therein'bv those skilled in the art without departing from the spirit and scope of the invention, and I do not wish to be limited to the details herein disclosed but what I claim is: 'l v 1. In a needle motion for Axminster looms, a needle rail, a needle carrier movable on the rail, a friction element located adjacent the needle carrier and having a plurality of projections, and means mounted on the carrier to engage said projections successively.

2. In a needle motion for Axminster looms, a needle' rail, a needle carrier movable onthe rail, a friction element mounted adjacent the path of the carrier and including a continuous flexible member, and means to establish connection between the carrier and. the continuous member at a plurality of spaced points.

3. In a needle motion for AXminster looms, a needle rail, a needle carrier movable along the rail, a friction element including a continuous flexible member, and means tn establish connection between the needle carrier and the continuous member when the needle is moving in one direction at a plurality of spaced points to move said member in one direction only, the connection between the carrier and the member being ineffectiveto move the latter when the needle Vcarrier is moved in the opposite direction.

il. In a needle motion for AXminster looms, a needle rail and a needle movable t-herealong, a dog moving with the needle, a friction element having a plurality of spaced portions each movable into the path of the dog, the dog being operatively connected to the friction member when the needle is moving in one direction to check the motion of the needle and being ineffective to cause motion of the friction element when the needle is moving in the opposite direction.

5. In a needle motion for looms, a needle rail, a needle carrier movable on the rail, a pivoted dog mounted on the carrier, a friction element having portions thereof located in the path of the dog to engage and be' moved by the dog as the needle nears the end of its stroke.

6. In a needle motion for looms, a needle rail, a needle carrier movable along the rail, a dog pivoted on the carrier, a plurality `of spaced projections movabletogether against friction one of which' is located in the path of the dog as the needle nears the limit of its stroke, the projection being spaced so that as the needle nears the end of its stroke another projeotion spaced from the one in Vvcontact with the dog will be brought into position to be engaged by said dog onthe next.

similar stroke of the needle.

n 7. In a needle motion for 'AXminster looms, a needle rail, av carrier movable along the rail, a needle mounted on the carrier, means to move the carrier and needle along the rail to cause said needle to move into and out of the shed of the loom,a friction element adjacent the rail, a member movable relatively to the carrier and movable therewith to have operative relation with the friction element until the needle finishes "its movement into the shed and at such times Vonly as the needle is being inserted into the shed to resist the last'part of the movement of the needle into the shed, said needle when moving out of the shed being disconnected from the friction element. f f

8. In a loom, an elongated member to be moved into' and out of the shed of the'loom, a guidel rail, a carrier for the elongated'member, means to move said carrier `on the rail to move said elongated member into and out of the shed of the loom, a friction element mounted adjacent to the rail and having relatively Xed and movable parts7 and means to establish connection between the movable part and the carrier and to maint-ain such connection until the needle finishes its movement into the lshed and at such times only as the elongated member is moving into the shed,

to resist the last part of the movement of the `1o elongated member into the shed, said carrier In testimony `whereof I have hereunto af- 15 fixed my signature.

EVERETT E. CLARK. 

